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ArticleName Processing of slag dumps, using the electrochemical treatment
ArticleAuthor Naguman P. N., Tokaeva Z. M., Nagumanova S. B., Bekova D. Kh.
ArticleAuthorData

Karaganda State Technical University (Ministry of Science and Education of the Republic of Kazakhstan), Karaganda, Republic of Kazakhstan:

P. N. Naguman, Assistant Professor, e-mail: kargtu@kstu.ru

 

Subsidiary of the National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan “Zh. Abishev Chemical and Metallurgical Institute”, Kara ganda, Republic of Kazakhstan

Z. M. Tokaeva, Head of Laboratory
S. B. Nagumanova, Engineer
D. Kh. Bekova, Engineer

Abstract

Non-ferrous metallurgy is one of industries in which there forms the largest amount of wastes. So, in pyro-metallic production of heavy non-ferrous metals, especially copper and lead, there form a lot of slags. Non-ferrous metals content in them often exceeds significantly their concentrations in the ores mined. For example, copper melting slags contain up to 0.1% of copper, 1 to 40% of zinc, 0.5 to 1.0% of lead, 15 to 40% of iron. If we take into account that copper ores with copper content up to 0.35 to 0.6% are subject to concentration, then metals concentration in copper production slags exceeds significantly specially mined ores. It is necessary to take into consideration the problems of ecological character and related nature-protective measures. A prospective method permitting to increase copper extraction from oxidized products is the method suggested, namely: electric treatment using a combined sulfur-graphite electrode. Therefore this work is devoted to studying the process of electrochemical-sulphidization of the copper oxidized forms with their following extraction into flotation concentrates. To do this there was used the method of mathematical planning an experiment. The simultaneous impact of all the factors (X1, current density, A/m2; X2, acid consumption, g/dm3; X3, repulping duration, min.; X4, electric treatment duration, min.; X5, L:S ratio) with their certain values presents the possibility of obtaining a concrete and practically reproducible result. As a result of studies there were derived equations of private dependences with determining their relevance and generalized multifactor equations permitting to optimize and predict the process of copper extraction from slag using electrochemical treatment. There is presented a nomogram of copper extraction from slag treated by the electrochemical method with a combination of the factors providing copper extraction at the level more than 95.0%.

keywords Copper oxidized compounds, electrochemical treatment, sulfur-graphite electrode, mathematical planning an experiment, factor, flotation, extraction
References

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